diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-10-09 11:43:57 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2017-10-09 19:07:29 +0300 |
| commit | a65adaf8a834504a4acdc0deca7fa790771add8a (patch) | |
| tree | 00f5f373c9b4f975b605367891d89c07858938b8 /drivers/gpu/drm/i915/i915_vma.c | |
| parent | 3bd4073524fa1586435725ad45ff971a6c2b2537 (diff) | |
| download | linux-a65adaf8a834504a4acdc0deca7fa790771add8a.tar.xz | |
drm/i915: Track user GTT faulting per-vma
We don't wish to refault the entire object (other vma) when unbinding
one partial vma. To do this track which vma have been faulted into the
user's address space.
v2: Use a local vma_offset to tidy up a multiline unmap_mapping_range().
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171009084401.29090-3-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_vma.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_vma.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c index 2b0083c34914..4dce2e0197d9 100644 --- a/drivers/gpu/drm/i915/i915_vma.c +++ b/drivers/gpu/drm/i915/i915_vma.c @@ -690,6 +690,30 @@ static void __i915_vma_iounmap(struct i915_vma *vma) vma->iomap = NULL; } +void i915_vma_revoke_mmap(struct i915_vma *vma) +{ + struct drm_vma_offset_node *node = &vma->obj->base.vma_node; + u64 vma_offset; + + lockdep_assert_held(&vma->vm->i915->drm.struct_mutex); + + if (!i915_vma_has_userfault(vma)) + return; + + GEM_BUG_ON(!i915_vma_is_map_and_fenceable(vma)); + GEM_BUG_ON(!vma->obj->userfault_count); + + vma_offset = vma->ggtt_view.partial.offset << PAGE_SHIFT; + unmap_mapping_range(vma->vm->i915->drm.anon_inode->i_mapping, + drm_vma_node_offset_addr(node) + vma_offset, + vma->size, + 1); + + i915_vma_unset_userfault(vma); + if (!--vma->obj->userfault_count) + list_del(&vma->obj->userfault_link); +} + int i915_vma_unbind(struct i915_vma *vma) { struct drm_i915_gem_object *obj = vma->obj; @@ -753,11 +777,13 @@ int i915_vma_unbind(struct i915_vma *vma) return ret; /* Force a pagefault for domain tracking on next user access */ - i915_gem_release_mmap(obj); + i915_vma_revoke_mmap(vma); __i915_vma_iounmap(vma); vma->flags &= ~I915_VMA_CAN_FENCE; } + GEM_BUG_ON(vma->fence); + GEM_BUG_ON(i915_vma_has_userfault(vma)); if (likely(!vma->vm->closed)) { trace_i915_vma_unbind(vma); |